Wyoming Department of Environmental Quality  | view as a webpage [ [link removed] ]

header new 2
Notice of Final Adoption of Water Quality Rules Chapters 1 and 2

The Department of Environmental Quality has revised Water Quality Rules, Chapter 1, Wyoming Surface Water Quality Standards; and Chapter 2, Permit Regulations for Discharges to Wyoming Surface Waters.

Chapter 1 has been revised to (1) fulfill the federal requirements at 40 CFR § 131.20, (2) restructure and align requirements with state law and federal law, regulations, and guidance; (3) revise designated uses and remove the designated use classification system; and (4) provide minor updates to specific water quality criteria. Chapter 2 has been revised to (1) update references to the designated use classification system to reflect proposed revisions to Chapter 1; and (2) incorporate provisions related to fish toxicants, aquatic pesticides, and short-term sediment disturbance that Water Quality Division proposed to move from Chapter 1 to Chapter 2.

The Environmental Quality Council adopted the revised rules at a public hearing held on June 11, 2025, in the City Council Chambers, 55 Grinnell Plaza, Sheridan, WY, 82801. The final rule was filed with the Wyoming Secretary of State on August 6, 2025.

Electronic copies of the rule are available from the Secretary of State at rules.wyo.gov, under “Current,” “Rules,” “Environmental Quality, Dept of (020),” “Water Quality,” and “Chapter 1” or “Chapter 2.”

If you have any questions concerning this rule adoption, please contact Gina Thompson at 307-777-7343 or *[email protected]*.

*Para español, visite deq.wyoming.gov [ [link removed] ].* "Americans with Disabilities Act: special assistance or alternative formats will be made available upon request for individuals with disabilities. Please provide at least fourteen (14) days before the close of the public comment period for such requests."


________________________________________________________________________



View in Español [ [link removed] ]

DEQ [ [link removed] ]
                        Hot New Topic:

     State of the Environment - DEQ's Podcast [ [link removed] ]




View in Spanish [ [link removed] ]

stay connected:

Facebook [ [link removed] ]  Twitter [ [link removed] ]  LinkedIn [ [link removed] ]  Instagram [ [link removed] ]  Youtube [ [link removed] ]

unsubscribe [ [link removed] ]  |  manage preferences [ [link removed] ]  |  help [ [link removed] ]

________________________________________________________________________

This email was sent to [email protected] using GovDelivery Communications Cloud on behalf of: Wyoming Department of Environmental Quality · 200 West 17th St.· Cheyenne, WY 82002 GovDelivery logo [ [link removed] ]
body .abe-column-block { min-height: 5px; } table.gd_combo_table img {margin-left:10px; margin-right:10px;} table.gd_combo_table div.govd_image_display img, table.gd_combo_table td.gd_combo_image_cell img {margin-left:0px; margin-right:0px;} table.govd_hr {min-width: 100%;} p, li, h1, h2, h3 { overflow-wrap: normal; word-wrap: normal; word-break: keep-all; -moz-hyphens: none; -ms-hyphens: none; -webkit-hyphens: none; hyphens: none; mso-hyphenate: none; }